io.prestosql.operator

Class TopNOperator.TopNOperatorFactory

java.lang.Object

io.prestosql.operator.TopNOperator.TopNOperatorFactory

All Implemented Interfaces:

OperatorFactory, WorkProcessorOperatorFactory

Enclosing class:

TopNOperator

public static class TopNOperator.TopNOperatorFactory
extends Object
implements OperatorFactory, WorkProcessorOperatorFactory

Constructor Summary

Constructors

Constructor and Description
TopNOperatorFactory(int operatorId, PlanNodeId planNodeId, List<? extends Type> types, int n, List<Integer> sortChannels, List<SortOrder> sortOrders)

Method Summary

Modifier and Type	Method and Description
WorkProcessorOperator	create(Session session, MemoryTrackingContext memoryTrackingContext, DriverYieldSignal yieldSignal, WorkProcessor<Page> sourcePages)
Operator	createOperator(DriverContext driverContext)
OperatorFactory	duplicate()
int	getOperatorId()
String	getOperatorType()
PlanNodeId	getPlanNodeId()
void	noMoreOperators() Declare that createOperator will not be called any more and release any resources associated with this factory.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.prestosql.operator.OperatorFactory

noMoreOperators

Constructor Detail

TopNOperatorFactory

public TopNOperatorFactory(int operatorId,
                           PlanNodeId planNodeId,
                           List<? extends Type> types,
                           int n,
                           List<Integer> sortChannels,
                           List<SortOrder> sortOrders)

Method Detail

getOperatorId

public int getOperatorId()

Specified by:

getOperatorId in interface WorkProcessorOperatorFactory

getPlanNodeId

public PlanNodeId getPlanNodeId()

Specified by:

getPlanNodeId in interface WorkProcessorOperatorFactory

getOperatorType

public String getOperatorType()

Specified by:

getOperatorType in interface WorkProcessorOperatorFactory

createOperator

public Operator createOperator(DriverContext driverContext)

Specified by:

createOperator in interface OperatorFactory

noMoreOperators

public void noMoreOperators()

Description copied from interface: OperatorFactory

Declare that createOperator will not be called any more and release any resources associated with this factory.

This method will be called only once. Implementation doesn't need to worry about duplicate invocations.

It is guaranteed that this will only be invoked after OperatorFactory.noMoreOperators(Lifespan) has been invoked for all applicable driver groups.

Specified by:

noMoreOperators in interface OperatorFactory

duplicate

public OperatorFactory duplicate()

Specified by:

duplicate in interface OperatorFactory

create

public WorkProcessorOperator create(Session session,
                                    MemoryTrackingContext memoryTrackingContext,
                                    DriverYieldSignal yieldSignal,
                                    WorkProcessor<Page> sourcePages)

Specified by:

create in interface WorkProcessorOperatorFactory